Jacob e



(No Model.) 1

J. R. SCOTT.

MACHINE FOR SEWING BOOTS AND SHOES.

No. 248,670. Patented Oct. 25,1881'.

SQ WITNESSES: V VENTOR:

ATTORNEYS.

UNITED STATES PATENT Gretna.

JACOB It. SCOTT, OF NYAGK, NEW YORK.

MACHINE FOR SEWING BOOTS AND SHOES.

SPECIFICATION forming part of Letters Patent No. 248,670, dated October 25, 1881.

Application filed October 29, 1880. (No model.)

To all whom it may concern Be it known that I, JACOB It. Soorr, ot' Nyack, in the county of Bockland and State of New York, have invented a new and useful Improvement in Machines for Sewing Boots and Shoes, of which the following is a speciti cation.

My improvements relate to sewing-machines for sewing boots and shoes or materials varying in thickness, and have for their object to obtain variable stroke of the needle regulated by movement of the presser-bar according to the-thickness of material being sewed.

My invention consists in a cam-sleeve fitted for movement by a cam on the presser-bar, and arranged to raise the fulcrum-post of the needle-bar as the presser-bar is raised, so that the presser-bar being positioned by the thickness of material the fulcrum post of the needle is correspondingly positioned.

In the accompanying drawings, forming part of this specification, Figure 1 is a side elevarion of a machine embodying my invention. Fig. 2 is a front view, partially in section; and Fig. 3 is a sectional plan view.

Similar letters of reference indicate corresponding parts.

A is a born the end of which will be fitted with the looping mechanism, as usual.

B is the presser-bar carrying presser-foot a and fitted for vertical movement in the plates 1) 0, that carrying the mechanism.

0 is the needle-bar fitted for reciprocation in plates 1) c.

D is the fulcrum-post sustaining the rocking-lever d, one end of which connects by rod 1) with a collar, 0, fast on needle-bar C, while the other end is connected to the rod 6 from an eccentric-strap of eccentric e, that is carried by the operating shaft f, whereby the necdle-bar is reciprocated.

Upon the presser-barB a shouldered sleeve, 9, is attached by a set-screw, so as to be adjustable for varyin gthelift. Above and around sleeve g is aloose sleeve, h,and above sleeve h is fixed a collar, i, upon which bears the spiral spring 'i, that forces the presser-bar downward. The collar 45 is formed with a lug projectin g above the collar 0 on the needle bar, so that the presser-bar is raised or given the usual lift at the moment the feed takes place by contact of collar 0 with the collar '5 as the needle bar rises. The sleeve h is recessed to set over and slide freely on sleeve g, as shown in Fig. 2, and upon bar Bis a spiral spring, h, which bears upon the upper edge of sleeve 9 and the top of the recess in sleeve h, so that the latter is forced upward against collar '5. The collar 4 is provided with pins projecting into sleeve h to keep the latter from turning.

Between the plates 1) 0 is fixed a post, 7c, on which is a loose sleeve, 1, that is provided at its lower end with an arm, I, that extends beneath the inclined projection m of a sleeve, m, that is fixed on the fulcrum-post D, so that the post D is sustained by the arm 1 and raised or allowed to fall by movement of the arm to and from said post. A spring, 0, serves to draw arm I away from the post D, and the sleeve l is also formed with a cam projection, on, extending above an inclined projection, n, on sleeve h. p

In operation the material passing beneath foot a raises the presser-bar B more or less. The sleeve h being at the same time raised by the spring h its projection it acts on the camprojection m of sleeve Z, and the sleeve being thereby turned, its arm Z is forced beneath the inclined projection m of sleeve on on fulcrumpost I), the post D is raised and the stroke of the needle thereby regulated according to the thickness of material being sewed. If the material increases in thickness the presser-bar and needle are raised farther, or it it diminishes a reverse movement of the needle-bar and presser-bar takes place, which movements occur without altering the relative distance between the lower end of sleeve h and the shoulder of sleeve g. As the needle-bar rises it raises the presser-bar to give the lift during the feed by contact of sleeve 0 with the projection on collar 2',- but that movement of the presser-bar sleeve h, such'spaee being required to prevent contact of the shoulder as the presser-bar is raised by the needle-bar. At other times the spring h is sufficient to move the parts. 5 Havingthus described myinvention, 1 claim as new and desire to secure by Letters Patent 1. In sewing machines, the combination of presser-bar 13, having fixed sleeve g, fixed collar i, and loose sleeve h, provided with projec- Io tionn, fulcrum-post D of the needlebar provided with sleeve m, having an inclined projection, and fixed post k, carrying sleeve 1, that is formed with arm 1, and cam-projeetion m, substantially as shown and described, for op- 15 eration as specified.

JACOB R. SCOTT.

Witnesses:

GEO. D. WALKER, O. SEDGWICK. 

